The perfect progressive 1) she was breathless. she (to run) all the way to the cabin. 2) i( to work) at this problem for an hour before i asked my father to help me. 3) they (to travel) for three months by the time they return. 4) she said the children (to play) since they went out. 5) tim (to make) the same spelling mistakes since i started teaching him. 6) we ( to correspond) since i moved to this town. 7) how long she (to stady) french before she left to paris? 8) the child is so dirty. he (to play) in the wet sand since morning. 9) my eyes are aching. i (to read) the the report for the whole afternoon. 10) by the time we finish the tenth form,we (to write) a lot of essays and summaries.
2) I( had been working) at this problem for an hour before I asked my father to help me.
3) They (will have been travelling) for three months by the time they return.
4) She said the children (had been playing) since they went out.
5) Tim (has been making) the same spelling mistakes since I started teaching him.
6) We (have been corresponding) since I moved to this town.
7) How long had she (been studying) French before she left to Paris?
8) He (has been playing) in the wet sand since morning.
9) I (have been reading ) the the report for the whole afternoon.
10) By the time we finish the tenth form, we (shall have written ) a lot of essays and summaries.